Investigating the ethical and practical challenges of one of the greatest threats to biodiversity: invasive species. Across the world, invasive species pose a danger to ecosystems. The UN Convention on Biological Diversity ranks them as a major threat to biodiversity on par with habitat loss, climate change and pollution. Tackling this isn't easy, and no one knows this better than Hugh Warwick, a conservationist who loathes the idea of killing, harming or even eating animals. Yet as an ecologist, he is acutely aware of the need, at times, to kill invasive species whose presence harms the wider environment. Hugh explores the complex history of species control, revealing the global movement of species and the impacts of their presence. Combining scientific theory with gentle humour in his signature style, he explains the issues conservationists face to control non-native animals and protect native species - including grey and red squirrels on Anglesey, ravens and tortoises in the Mojave Desert, cane toads in Australia and the smooth-billed ani on the Galapagos - and describes cases like Pablo Escobar's cocaine hippos and the Burmese python pet trade. Taking a balanced and open approach to this emotive subject, Hugh speaks to experts on all sides of the debate. How do we protect endangered native species? Which species do we prioritise? And how do we reckon with the ethics of killing anything in the name of conservation?

WINNER OF THE ZSL CLARIVATE AWARD FOR COMMUNICATING ZOOLOGY.
LONGLISTED FOR THE WAINWRIGHT PRIZE FOR WRITING ON CONSERVATION.

'Honest and intelligent.' CHRIS PACKHAM
'Expertly researched, engaging and even-handed.' BBC WILDLIFE
'Fascinating and indispensable.' GEORGE MONBIOT
'Every nature lover should read it.' AMY-JANE BEER

Investigating the ethical and practical challenges of one of the greatest threats to biodiversity: invasive species.

Globally, the threat to biodiversity of invasive species is on a par with habitat loss, climate change and pollution. Tackling this isn't easy, and nobody knows that better than Hugh Warwick. As a conservationist, he loathes the idea of killing, harming or even eating animals. As an ecologist, he is acutely aware of the need, at times, to kill invasive species whose presence harms the wider environment.

How do we protect endangered native species? Which species do we prioritise? And how do we reckon with killing anything in the name of conservation? Taking a balanced approach to this emotive subject, Hugh talks to experts on all sides as he explores the impact of species control.

In his signature humorous style, he outlines the issues conservationists face in managing non-native animals and protecting native species, including grey and red squirrels on Anglesey, ravens and tortoises in the Mojave Desert, and unique cases like Pablo Escobar's cocaine hippos and the Burmese python pet trade.